The Genuine HP LaserJet W9030MC-33MC B/M/Y/C Toner Cartridges Full Set includes cyan, yellow, magenta, and black toner cartridges designed specifically for the HP LaserJet MFP E67550 model. These original HP cartridges ensure high-quality printing results and are compatible with the specified printer. With a unit quantity of 4, this full set provides all the necessary toner for consistent and professional printing tasks. Additionally, California Proposition 65 requires businesses to provide warnings about potential chemical exposure, and this product complies with the necessary requirements for safety information.